From owner-svn-src-stable-12@freebsd.org Wed Dec 12 11:30:47 2018 Return-Path: Delivered-To: svn-src-stable-12@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 113F71338CA2; Wed, 12 Dec 2018 11:30:47 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from mxrelay.nyi.freebsd.org (mxrelay.nyi.freebsd.org [IPv6:2610:1c1:1:606c::19:3]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) server-signature RSA-PSS (4096 bits) client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "mxrelay.nyi.freebsd.org", Issuer "Let's Encrypt Authority X3" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id AA211893D9; Wed, 12 Dec 2018 11:30:46 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org (repo.freebsd.org [IPv6:2610:1c1:1:6068::e6a:0]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mxrelay.nyi.freebsd.org (Postfix) with ESMTPS id 79B297460; Wed, 12 Dec 2018 11:30:46 +0000 (UTC) (envelope-from hselasky@FreeBSD.org) Received: from repo.freebsd.org ([127.0.1.37]) by repo.freebsd.org (8.15.2/8.15.2) with ESMTP id wBCBUkdS046622; Wed, 12 Dec 2018 11:30:46 GMT (envelope-from hselasky@FreeBSD.org) Received: (from hselasky@localhost) by repo.freebsd.org (8.15.2/8.15.2/Submit) id wBCBUkdC046621; Wed, 12 Dec 2018 11:30:46 GMT (envelope-from hselasky@FreeBSD.org) Message-Id: <201812121130.wBCBUkdC046621@repo.freebsd.org> X-Authentication-Warning: repo.freebsd.org: hselasky set sender to hselasky@FreeBSD.org using -f From: Hans Petter Selasky Date: Wed, 12 Dec 2018 11:30:46 +0000 (UTC) To: src-committers@freebsd.org, svn-src-all@freebsd.org, svn-src-stable@freebsd.org, svn-src-stable-12@freebsd.org Subject: svn commit: r341886 - stable/12/sys/ofed/drivers/infiniband/ulp/ipoib X-SVN-Group: stable-12 X-SVN-Commit-Author: hselasky X-SVN-Commit-Paths: stable/12/sys/ofed/drivers/infiniband/ulp/ipoib X-SVN-Commit-Revision: 341886 X-SVN-Commit-Repository: base MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-Rspamd-Queue-Id: AA211893D9 X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org X-Spamd-Result: default: False [-0.70 / 15.00]; local_wl_from(0.00)[FreeBSD.org]; NEURAL_HAM_SHORT(-0.70)[-0.702,0]; ASN(0.00)[asn:11403, ipnet:2610:1c1:1::/48, country:US] X-BeenThere: svn-src-stable-12@freebsd.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: SVN commit messages for only the 12-stable src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 12 Dec 2018 11:30:47 -0000 Author: hselasky Date: Wed Dec 12 11:30:46 2018 New Revision: 341886 URL: https://svnweb.freebsd.org/changeset/base/341886 Log: MFC r341536: ipoib: Don't do a light flush when MTU is unchanged. When changing the MTU of ibX network interfaces, check that the MTU was really changed before requesting an update of the multicast rules. Else we might go into an infinite loop joining and leaving ibX multicast groups towards the opensm master interface. Sponsored by: Mellanox Technologies Modified: stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Directory Properties: stable/12/ (props changed) Modified: stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c ============================================================================== --- stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Wed Dec 12 11:30:21 2018 (r341885) +++ stable/12/sys/ofed/drivers/infiniband/ulp/ipoib/ipoib_main.c Wed Dec 12 11:30:46 2018 (r341886) @@ -305,9 +305,11 @@ ipoib_change_mtu(struct ipoib_dev_priv *priv, int new_ priv->admin_mtu = new_mtu; error = ipoib_propagate_ifnet_mtu(priv, min(priv->mcast_mtu, priv->admin_mtu), propagate); - if (error == 0) - queue_work(ipoib_workqueue, &priv->flush_light); - else + if (error == 0) { + /* check for MTU change to avoid infinite loop */ + if (prev_admin_mtu != new_mtu) + queue_work(ipoib_workqueue, &priv->flush_light); + } else priv->admin_mtu = prev_admin_mtu; return (error); }